ALC850 Sound

[Vincent Zwanenburg]

Well, after some hassle finally I've got OS X 10.4.6 to run in a decent way. Have upgraded my Radeon 9800Pro firmware to 9800XT to get Omni's driver to run, so now I finally have a decent screen resolution. One problem remains though.

 

My computer is equiped with the Realtek AC97 ALC850 sound chip on it's motherboard (Asus pvp800-e deluxe). After installing OS X I immideately installed the enhanced AC97 driver listed in the install guide. In System Preferences -> Sound I can select two output devices: Line Out on AC97 Audio PCM (PCM) and SPDIF Out on AC97 Audio PCM (SPDIF). Of course, I selected the Line Out.

 

Now, in Audio MIDI Setup I can change my speakers settings. I've let them be though, affraid of doing something wrong. Without altering these settings I still should have been able to hear at least the left channels sound. Well that's where it goes wrong: I don't hear a thing. Both iTunes and Quicktime are awfully silent.

 

In System profiler: software, extentions, this is shown:

AppleAC97Audio:

 

Version: 1.0.0

Last Modified: 11/25/05 8:33 AM

Get Info String: 1.0.0, Copyright Apple Computer, Inc. 2004

Location: /System/Library/Extensions/AppleAC97Audio.kext

kext Version: 1.0.0

Load Address: 0x23df1000

Valid: Yes

Authentic: Yes

Dependencies: Incomplete

Dependency Errors:

com.apple.iokit.IOAudioFamily: No valid version of this dependency can be found

Integrity: Kext has no receipt

 

AppleAC97AudioIntelICH:

 

Version: 1.0.0

Last Modified: 11/25/05 8:33 AM

Get Info String: 1.0.0, Copyright Apple Computer, Inc. 2004

Location: /System/Library/Extensions/AppleAC97Audio.kext/Contents/PlugIns/

 

AppleAC97AudioIntelICH.kext

kext Version: 1.0.0

Load Address: 0x23ddd000

Valid: Yes

Authentic: Yes

Dependencies: Incomplete

Dependency Errors:

com.apple.driver.AppleAC97Audio: No valid version of this dependency can be found

com.apple.iokit.IOPCIFamily: No valid version of this dependency can be found

Integrity: Kext has no receipt

 

Does this ring a bell to anyone? Please help me get my tunes! Thanks in advance.

 

Regards, Vincent.